Tire for vehicle-wheels.



E. KEMPSHALL.

TIRE FOR VEHICLE WHEELS. APPLICATION FILED JULY 8, 1907.

Patented Apr. 6, 1909.

"UNITED srer S PATET OFFICE.

ELEAZER KEMPSHALL, OF LONDON, ENGLAND, ASSIGNOR TO KEMPSHALL TYRE COMPANY.

\ OF EUROPE, LIMITED, OF LONDON, ENGLAND.

TIRE FOR VEHICLE-WHEELS.

Specification of Letters Patent.

Patented. April 6, 1909.

To all whom it may concern; I

Be it known that I, ELEAZER KEMPSHALL,

of the Hotel Russell, London, WV. O., England, manufacturer, 'a citizen of the United States of America, have lnvented'certain new and useful Improvementsin Tires for Vehicle-Wheels, of which the following a specification. 1 v

This invention relates to tiresfer vehicle wheels, and more particularly to tires employed upon-motor-propelled omnibuses and mher like vehicles.

The object of the invention is to provide'a tread surface of such a nature that it will inclose air, which Will be compressed as they come into contact with the road and react on the tire to increase it resiliency, and the narrow contact surfaces of the ridges will afford a minimum frictional contact with the road.

The accompanying drawings illustrate the inventionFigures 1 and 2 being plans of several forms, Flg. 3 a cross-section corresponding thereto; Fig. 4 illustrating the application to a tire band.

In carrying out the inventionaccording to one mode, a series of V-shaped ridges a- (Fig. '1) 1s formed upon the tread surface I) of a solid or pneumatic tire, the ridges apro- Jecting considerably above the surface of the tire. The bottom of each pocket 0 within the ridges preferably goes below the level of the tread surface of the tire-as indicated in Fig. 3so that, if the ridges wear down, pockets will still exist. The individual ridges all point in the direction of movement, or they may be alternately arranged, so that; the ;one will-point in one direction and the next will point in the opposite direction, and so on. Instead of forming simple \l-shaped ridges, triangular-she ed ridges may be used, as. atdfbig. 1'). n another form', the ridges "*may' be of '(liamond shape, as shown inp'lfig. .2. In whatever form the ridgesmay be used, it is preferred to arrange them so that they arehc'ontiguous, iri order that a, continuous contact surface will be provided, thereby avoiding unnecessary viration.

The invention is equally applicable to bands adapted to be secured to existing tires, such a band being shown in Fig. 4.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. The combination with a wheel tire, of ridges closing air pockets, both the inner and'outer walls of all the ridges being parallel, and central intermediate ridges connecting the aforesaid ridges, the walls of the latter ridges being parallel, the tread surface of all the ridges being arallel to the geometrical axis of the whee, so as to pre sent a fiat tread to the road surface for the purpose hereinbefore setforth.

2. A tire having ridges inclosingt air pockets, the tread surfaces 'of' the ridges being parallel to the geometrical axis of the wheel to present a flat tread to the road sur- 

